https://github.com/torvalds/linux
Revision 79e1c5e70b2a0fadb7b61c69de8442703e7d0dc4 authored by Thomas Petazzoni on 04 December 2017, 15:09:06 UTC, committed by Rich Felker on 12 April 2018, 23:47:58 UTC
The code setting up the PCI -> SuperHighway mapping doesn't take into account the fact that the address stored in PCIELARx must be aligned with the size stored in PCIELAMRx. For example, when your physical memory starts at 0x0800_0000 (128 MB), a size of 64 MB or 128 MB is fine. However, if you have 256 MB of memory, it doesn't work because the base address is not aligned on the size. In such situation, we have to round down the base address to make sure it is aligned on the size of the area. For for a 0x0800_0000 base address with 256 MB of memory, we will round down to 0x0, and extend the size of the mapping to 512 MB. This allows the mapping to work on platforms that have 256 MB of RAM. The current setup would only work with 128 MB of RAM or less. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Rich Felker <dalias@libc.org>
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Tip revision: 79e1c5e70b2a0fadb7b61c69de8442703e7d0dc4 authored by Thomas Petazzoni on 04 December 2017, 15:09:06 UTC
arch/sh: pcie-sh7786: adjust the memory mapping
arch/sh: pcie-sh7786: adjust the memory mapping
Tip revision: 79e1c5e
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| .cocciconfig | -rw-r--r-- | 59 bytes |
| .get_maintainer.ignore | -rw-r--r-- | 31 bytes |
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| COPYING | -rw-r--r-- | 18.3 KB |
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| Kbuild | -rw-r--r-- | 2.2 KB |
| Kconfig | -rw-r--r-- | 287 bytes |
| MAINTAINERS | -rw-r--r-- | 436.3 KB |
| Makefile | -rw-r--r-- | 60.6 KB |
| README | -rw-r--r-- | 722 bytes |
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